Linear peristaltic metering pump

A linear peristaltic metering pump for operating a working hose comprising a pump body, a hose fixing accessory and an anti-backflow accessory, wherein the hose fixing accessory is configured for arranging the working hose;

• the anti-backflow accessory is configured for clamping and loosening the working hose;
• and the pump body is configured for performing reciprocating motion to clamp or loosen the working hose;
• the pump body comprises a lifter, a roller hose-pressing assembly including a first clamp, a pump body outer cover assembly and a power transmission part;
• and the power transmission part is configured for driving the lifter to perform a lifting and lowering linear motion, so as to drive the roller hose-pressing assembly to move and to clamp or loosen the working hose,
• wherein the hose fixing accessory comprises a vertical hose fixing rod, an elastic joint holder, an inner joint and an outer joint;
• the vertical hose fixing rod is vertically arranged on a side of the pump body;
• and the vertical hose fixing rod is provided with more than one elastic joint holder, inner joint and outer joint to fix the working hose,
• wherein the anti-backflow accessory comprises a second clamp,
• wherein the lifter comprises a lifting screw assembly and a guide shaft;
• a middle section of the guide shaft is arranged on a linear bearing;
• two ends of the guide shaft are respectively connected with an upper guide shaft fixing plate and a lower guide shaft fixing plate;
• and the lifting screw assembly is connected to the lower guide shaft fixing plate and is driven by the power transmission part, so as to drive the guide shaft to perform the lifting and lowering motion,
• wherein the power transmission part comprises a lifting drive motor, and the lifting drive motor is connected with the lifting screw assembly through a coupling to perform driving motion.